title: Physical activity and sedentary behaviours in youth: issues and controversies.
mesh_terms: D002648:Child; D015444:Exercise; D005260:Female; D006801:Humans; D008019:Life Style; D008297:Male; D009765:Obesity / Q000453:epidemiology* / Q000209:etiology; D012307:Risk Factors; D013690:Television; D018910:Video Games